Saw-set.



A; sERFb'z'o'.

Patented Oct. 2, 1917.

2 SHEETS-SHEET 1;

A. sERrtizb'.

-SAW SET.

APPLICATION FILED JUNE I9. 1916.

1,241,772. Patented Oct. 2,1917.

2 SHEETS-SHEET 2.

An'ronsnnrozo, or DENVER, COLORADO.

SAW-SET.

Specification of Letters Patent.

Patented Oct. 2, 191 '7.

Application filed June 19, 1916. Serial No. 104,507.

To all whom it may concern Be it known that I, ANTON snnrozo, a. subjectof the King of Hungary, residing at Denver, in the county of Denver andState of Colorado, have invented new and useful Improvements inSaw-Sets, of which the following is a specification.

This invention relates to improvements in apparatus for bendingalternate teeth upon saw blades, commonly known as saw-sets.

One of the objects of the invention is to provide a hand actuated deviceadapted to operate in a rapid and etlicient manner without specialexperience on the partof the operator.

Another object is to provide an apparatus having means whereby sawshaving difi'erently spaced teeth may be operated upon, it being possibleto adjust the apparatus to suit varying conditions of teeth distance.

A further object is to provide in such an apparatus, means for feedingthe teeth intermittently into the range of bending action, and finally,to provide such a device in a specially compact form, such as may read*ily be carried in any workmans kit.

These and other similar objects are attained by the novel constructionand combination of parts hereafter described and shown in theaccompanying drawings, forming a material part of this specification,and in which Figure 1 is a perspective view of the apparatus, made inaccordance with the invention.

Fig. 2 is a transverse sectional view,taken on line 22 of Fig. 5.

Fig. 3 is a top plan view of the apparatus.

Fig. 4 is a front elevation of the same.

Fig. 5 is a vertical sectional view, taken on line 55 of Fig. 3.

The invention is comprised of a pair of plates 10 and 12 respectivelyouter and inner, the same having a like profile and engaged at theirends by extensions 14 of the handle 15 by which the implement ismaneuvered.

These plates are of reduced thickness for a considerable portion oftheir height, the upper edges being allowed to approach each otherwithin a short distance and secured to the inner surface of the platesare hardened anvils 16 and 17, adapted to contact with the sides of thesaw in its passage through the implement and to support the same duringthe bending action.

Also attached to the upper edge of the plates 10 and 12, opposite to theanvils 16 and 17 are secured Ilat, obliquely disposed resilient strips18 and 19, extending downwardly alongside the plates.

A shaft 21 is mounted in the lower part of the plates 10 and 12 and hassecured to it cams 22 and 23, the inner faces of which are formed intotwo uniform raising sections terminating abruptly. This shaft has alsomounted upon it a lever 24, having an operating handle 25 by which theshaft and cams may be rotated.

These cams work directly upon the ends of the resilient strips 1.8 and19 so that as the shaft is. turned, first one and then the other isforced inwardly toward the plates and caused to make contact with theoutstanding ends of hardened plunger hammers 26 and 27, which areslidably engaged within the plate 12 and furnished with helically woundpush springs 28 and 29 by which they are normally pressed outwardagainst the inner edge of the spring elements 18 and 19.

The plunger hammer 26 is slidably contained within a bushing or sleeve30 formed with a sliding element 31, the sleeve 30 sliding in the slot32, formed through the side of the plate 10, while the slide is movableby means of the projection 33 and can be clamped when in an adjustedposition by means of the screw Secured on the shaft 21 between plates 10and 12 is a face cam 36, the same being set in timed relation to thecams 22 and 23 and adapted to impinge upon a flat resilient element 37set in the lever 38, the lever having a slot 39 slidably mounted on apin -10, rigidly set on the side plates 10 and 12.

A spring 42, secured at 43 to the lever 38 is coiled around a post 1 1,fixed in the plates, the extreme end of the spring being turned outwardand secured at 45.

A second spring 48 engaged in a slot formed in the back of the lever-38,is coiled around the pin 44, and continuing to another coil around thepin 49 from whence it is extended through a slot in the lever 38 andterminating in the hook 50, the construction and arrangement of thesprings being such as to hold the lever 38 fioatingly, normally pressedagainst the cam, opposite to the screw 43 whereby the spring element 37is always under tension, causing the lever to rock on the pivot 40,while the tendency of the spring 48 is to maintain the lever 38 so thatthe extreme point 52 will be carried toward the top so far as the pin 40will permit as engaged-within the slot 89.

A pair of rollers 54 are freely pivoted between the plateslO and 12 nearthe ends thereof and serve as supports to receive the saw when enteredbetween the anvils 16 and 17.

In operation, the saw being placed as indicated in Fig. '1, the handleis actuated, causing the shaft 21 to rotate, whereupon the cams 21 and23 impinge successively against the pins 28 and 29, forcing the innerends against the teeth and bending the same a alternately in oppositedirections.

At each full revolution of the cam, two adjacent teeth are operated uponand, during the return of the hammer plungers, the

lever 38 is operated, causing thepoint 52 to engage with the teeth,advancing the saw blade the necessary amount to place two teeth nextadjacent in condition for further operation.

'The longitudinal distance between the plungersQG and. 27 is made inconformity with the center distance of any two adjacent teeth bychanging the position of the slide v31 in an obvious manner, and thelever 38 is so mounted as to automatically become engaged with the teethof the saw and advance the same, irrespective of the distance betweensucceeding teeth, the motion imparted in advancing the saw being such asnot to injure the cutting edges.

Having thus described my invention, together with the manner of itsoperation and use, what I claim as new and desire to secure by LettersPatent is 1. In a sawset, the combination with a pair of plates, anvilsdisposed on the inner surface of said plates, resilient members disposedon the outer surface of said plates, plunger hammers disposed obliquelyin said plates and movable therethrough in register with said anvils andadapted to be impelled by said resilient members, a shaft revolublymounted in said plates, means for actuating said shaft, a pair of sidecams each having a double throw mounted on said shaft exteriorly of saidplates and adapted to impinge the resilient members, a face cam mountedon said shaft between said plates,

and a floating lever for feeding the sawblade, said lever having a partengageable by the last mentioned cam.

2. In a saw-set, the combination with a handle having a pair of plates,anvils disposed on the inner surface of the plates, resilient membersdisposed on the outer surface of the plates, plunger hammers disposedobliquely in said plates behind said resilient members and slidably inregister with said anvils, a floating lever for feeding handle, a pairof plates secured thereto and spaced from each other, an anvildisposedon the inner surface of each plate, a resilient nember disposed on theouter surface .of each plate, a plunger hammerobhquely d1S- posed ineach plate in register with an anvil and adapted to be impelled by aresilient member, a shaft revolubly mounted in said plates, means foractuating said shaft, a pair of side cams mounted on said shaft one onthe outside of each of said plates, said cams being adapted to impingethe resilient members, a face cam mounted on said shaft between saidplates, and a floating lever for feeding the saw-blade, said leverhaving a part engageable by. the last mentioned cam.

4. In a saw-set, the combination with a handle bent upon itself andprovided between its opposed ends with a pair of plates spaced from eachother, a pair of anvils disposed on the inner surface of said plates,hammer plungers slidably in register with said anvils, said plungersbeing disposed obliquely to said plates, means for actuating said hammerplungers, a floating feedvlever,

means for advancing said feed lever at uniform intervals and larelationto the plunger action, said operating means being resilientlyapplied and means for thrusting said lever against the teeth of asaw-blade inserted between said anvils.

In testimony whereof I have signed my name to this specification.

ANTON sERFoZo.

7 Copies of this patent may be obtained for five cents/each, byaddressing the Commissioner of Patents,

Washington, D. C. a

